Scotty I have a small problem with a 2004 Chevy S-10 4 x 4 Crew cab with the Vortech V=6 jUnder the Hood now where i have the problem is on the rear that i just put in i can not get the fill plug out of the side of the Rear and I have tried everything but heat to which i do not have a torch. have you got any suggestions if I cannot get this plug out there is a tube that connects to a rubber hose that goes into the Truck somewhere if all else fails can i use this pipe to put Gear oil into the Rear here is a pic of the Rear and the Tube I am talking about

if the rubber hose goes to the rear end vent, you could slowly put fluid in there